Oxygen sensor



FIG. 1 is a perspective elevational view of a oxygen sensor showing our new design; and

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top elevational view thereof; and,

FIG. 7 is a bottom elevational view thereof.

The broken line showing of an unclaimed part of the oxygen sensor form no part of the claimed design. 

CLAIM The ornamental design for an oxygen sensor, as shown and described. 